TW200826549A - Method and apparatus for network management using periodic measurements of indicators - Google Patents

Method and apparatus for network management using periodic measurements of indicators Download PDF

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Publication number
TW200826549A
TW200826549A TW96118078A TW96118078A TW200826549A TW 200826549 A TW200826549 A TW 200826549A TW 96118078 A TW96118078 A TW 96118078A TW 96118078 A TW96118078 A TW 96118078A TW 200826549 A TW200826549 A TW 200826549A
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measurement
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TWI368414B (en
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Joseph A Kwak
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Interdigital Tech Corp
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00—Arrangements for monitoring or testing data switching networks
    • H04L43/06—Generation of reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/14—Access restriction or access information delivery, e.g. discovery data delivery using user query or user detection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Description

200826549 九、發明說明： 【發明所屬之技術領域】 本發明係關於無線槽式通訊（wireless sl〇ttecj communications)中所使用之信標(beac〇n)測量要求訊號及網路 管理。尤其是，本發明係關於使用週期性參數測量，例如新信 標接收功率準位或訊號品質之網路管理。 " 【先前技術】
IEEE 802.11通訊允許用戶在多個可能於相同或分離頻道 上操作之存取點之間漫遊。正EE 802.u通訊通常經由盔線 LAN存取點(APs)而產生效應，其通常為單一獨立的單元，但 可能^括具有提供漫遊功能之多重APS之網路。為支援漫遊 功能，每一存取點通常每100ms傳輸一信標訊號。漫遊站(sta) 使用此信標測量其存在之存取點連結的強度。如果STA感測 到弱訊號，此漫游STA可以實施重新關聯服務以連結至&射 一較強訊號之存取點。 x IEEE 802.11支援二種功率模式；驅動及功率節省(p 基礎網路與—hoc網路之協定是不同的。在基礎網路之中，有一 们 瓜視母行動站之模式。在驅動模式中的站被完全供電 且因此可以在任何時間傳輸及接收。相反地，在PS模式^的 站僅週期性地被喚㈣檢查可能來自^之進人的封包固 知其μ。此^週期性地傳輸由-固 疋。4不區間所分離之信標框(beac〇n如咖）。任一 這些框。在每-信標框内傳輸—流量指示地圖(祕iei;^見 :=:標框包含具有該陳緩衝主播封二
區ίIDs。AP在收到其ID時應該為剩下的信標 。在連接的週期之下(亦即,DCF)，被喚醒的PS 包。而以:爭psJOLL至該Μ以便重新獲得該緩衝的封 在無观f週期之下(亦即，PCF)，PS站等待ΑΡ以對其 6 200826549 ，行探詢(poll)。此AP傳送信標框内之傳遞TIMs(DTIMs)以指 示有緩衝的廣播封包。此傳遞丁IMs由一固定數量的作標區問 分離。就在DHMs讀，緩衝的廣播封包被傳送。” 一因為正EE 802.11假設行動站被完全連結，一信標框的傳 輸可被用以同步所有站的信標區間。除了在正EE8〇211中的 ，用之外，信標訊號一般在其它的WLAN通訊及無線通訊中 是有用的。週期性地測量在實施第三代合作計劃(3Gpp)寬頻分 1多重存取系統(W_CDMA)之系統中被實施。此種系統使用分 日守雙工模式。為支援正EE 802.11標準中有效率網路管理用之 較高層功能，希望有數種關於不同形式之網路管理的實體來 數。 、> 曰s此種參數中有一種是預接收訊號對雜訊指示(pSNI)，其測 置提供一種所有頻道/速率及所有實體頻道中及所有站之間所 ，之被接收訊號品質之量化的，及比較性的測量。另一個參數 疋在天線連接器測量之被接收頻道功率指示(RCJ>I)指標，其為 ，選擇頻道中之被接收RF功率之測量。此參數可以是 藉由在PLCP標頭(preamble)及整個接收的框上被測量之頻道 中^接收的RF功率之PHY次層的一個測量。RCn係dBm 中定義之被接收轉準位之單調增加的對數練。RCpi來數 之例示的允許值可以是從〇至22G範圍中的_個8位元值。 f已知的方法中，參數RCPI及PSNI_量係被當成單 -測錢行，此方法具有某些缺失。妓提供參細量的改善 如，RCPI及醜’以在更有效率的網路測量中產生 特定的優點。 【發明内容】 芬新信標要求之週期性測量以便支援漫遊 =及相關功能。週期性測量的概念以類比於 貫施使用》式之第三代合作賴(3Gpp)寬頻分碼多 200826549 重存取(W-CDMA)之系統中 之週期測量的方式而執行 【實施方式】 設備=動视於使用者 之能夠在無線網路環境中操作 ♦▲二或任何其他型態 包括但不限於點B，位置押、衣^苓照以下時，存取點 他型態之介面裝置。’存取點或無線環境中任何其 裝置「存取點(AP)」是一個提供
-部份無線取’以及建立 上之固定裝置，此AP 衣置。如果此AP是WLAN 許WTRU至一網路的連的站。此AP允 連接。 假°又WLAN本身具有至該網路的 期性CPI及PSNI，之崎理係週 上的影響及伴隨的利=1式。執行週期性測量在網路性能 之有益的遊及動態資料速率 中，本㈣_====咖咖内容 -- 以值之頻道號?、。此， 4 ‘允許一二描模 ^動掃描」模式，「被動掃描」模式，以及「信 應不“b採查回應是否由測量中的STA本身的探查要求所 200826549 =。在摘掃描模式巾，測量巾的STA被動地在特定 回覆-個包含每—STA用之—資訊元素，其自g 或探查回應。如果測量中的頻道也是服務中： 道’ STA同日嫌行其正常資料流量運作。在 頌 優點以下是職性測量與單方法她之下的—些潛在 但僅===低管理流量：單—測量要求產生多重報告， 言是ϋτ測量上的絕對臨界值對電訊位置之接近偵測器而 ΐίϊίΐΐ ΓαΪΊ對臨界值偵測傳遞用之情況。 域）。此、^3扣疋週期信標測量之週期延展(資訊區 情兄提4,量用之參數及測量結果之 量要求產生多it告週期性測量，因此單一測 提供。在預先接收訊號對被認為相關時才被 適合用以觸發資料速率4 此等在歷上之測量 絕觸界電财被當錢旨桃CPI)上之 額外的於^期性信標測量之信標要求中之 量，且因此不能進行週期曰*^处用之選擇性的容 Ξ;=ΐ係執行- 200826549 此等絕對臨界值電訊係適用於用以決定相對於一 ^之位 置及鄰近位置用之接近偵測器。相對於一服務中^之一相對 臨界值被用以偵測傳遞(handoff)用之情況。 對應信標之測量要求區域被表示在表丨，並包含此要求使 用之測量_及頻親碼。在表丨巾_也包含指定週雛測 量^情況報告所需之延展(額外的資訊區域）。表丨大致上表示 標要求之測量要求區域格式。目前測量的說明表示頻道號 f ，帶，測量期間以及掃描模式用之8位元(octets)之號碼: 為比較，表1也表示相對於基本服務設定識別(BSSID)，測 週期，報告情況，臨界/偏移’以及磁滯效應之週雛延展之8 °尤其是’對應—信標要求之測量要求區域被表示在第1 =包使用之測量需求及頻道號碼。對信US 應係一信標報告。 表1-信標要求 頻道號碼 頻帶 測量期間 8位元 1 1 2 1 8位元
1. 目，丨八^?处不能執行週期性測量且因此無法辨認此等延屏， 、j ρ心略此延展並提供一單一測量及一單一報告。 、 旨科求的STA命令魏的STA回報 f旨示要求的STA命令接收的STA回報偵^信= 二求回應所在的頻魏碼。頻帶區域指*，從表1，於立二 彳3^量之歸。此娜赋區域被奴 1心依據表2(在以下）。這些掃描行為如下： 田的 200826549 探杳=動=模式巾’晴的STA傳輪具有廣播咖之 ΐ itTA I量/TA之信標報告包含每—^之資訊元 Ϊ是否或f查回應，不管此探查回 里的STA本身的探查要求所觸發。 接收並ί回動二量 =從信標或探査二 頻道SfA啊執行其正常資織量操作。 内容之H的sta送回包含其信標表之目前 广曰報告，而不執行額外的測量。 表示測里綱區域被設定轉於被要求的測量的細，以Tus 之掃要求之鮮絲及信標要求元素用 表2-無線測量要求用之頻帶定義··
表3 之掃描模式定義
11 200826549 BSSID指示此測量由此被要求之特定AP。此Bssn)指定 那一 AP於數個aps於一預定頻道上為可偵測時進行測量。此 BSSID被設定為廣播BSSID，當此測量在此頻道上之任何 上執行，、。廣播的BSSID於一 apBSSID未知時被使用。 測量週期指示此測量是否為一單一測量事件或是在每一 測量，期被鍾之-職性·。此·聊被分割為二次區 域·單位及週期。單位次區域定義週期次區域用之時間單位並 由具有以下數值之2 MSBs所組成。 此週期次區域由14LSBs組成且代表此週期測量之重覆時 間區間^無符號之整數。週期次區域值〇代表此測量不是週期 性的，是一單一測量。16383(3FFF Hex)之週期次區域值代表 此，週期性的具有無要求的週期測量週期；在此情況中， 測1在最佳效果基礎上執行並且依情況所允許地頻繁進行。 報告情況定義被測量結果何時被報告至要求的STA。此 告情況值被定義在表4。 表4-信標要求元素用之報告情況定義 _____jf況描述 報告情況 在每一測量之後發出報告 0 當被測量AP電訊之Rcpi軸在一具有磁滯之絕 對臨界值之上時發出部告 1 當被測量AP電訊之Rcpi帛位在一具有磁滯之絕 對臨界值之下時發出報告 2 當被測量AP電訊之PSNI準位在一具有磁滯之絕 對臣品界值之上時發出報告 3 當被測量AP電訊之PSNI準位在一具有磁滯之絕 對臨界值之下時發出報告 4 當?_量ΑΡ^^^ρι準位在從該服務中AP 5 12 200826549 之KCPI之—偏移(具有磁滯)所定義之一臨界值之 _上時發出報告 當破測量AP電訊之RCPI準位在從該服務中AP 之RCPI之一偏移(具有磁滯)所定義之一臨界值之 下時發出報告 ~6 當被測量AP電訊之PSNI準位在從該服務中AP 之PSNI之一偏移(具有磁滯)所定義之一臨界值之 上時發出報告 7 當被測量AP電訊之PSNI準位在從該服務中AP 之PSNI之一偏移(具有磁滯)所定義之一臨界值之 下時發出報告 8 當被測量AP之RCPI準位進入並維持在由該服務 中AP之RCPI與來自該服務中之Ap之Rcpi之一 偏移(具有磁滯)所包圍之一範圍内時，開始週期性 報告(每測量一報告） 9 當被測量AP之PSNI準位進入並維持在由該服務 中AP之PSNI與來自該服務中之AP之PSNI之一 偏移(具有磁滯)所包圍之一範圍内時，開始週期性 報告(每測量一報告） 10 保留 11-255 臨界值/偏移提供將被情況報告所使用之臨界值或偏移 值。一臨界值係具有等於PSNI或RCPI單位之無符號之8位 元整數。偏移值係(-127, +127)範圍内之一個有符號的7位元整 數。 磁滯提供單位等於臨界值/偏移區域中所使用之單位之無 符號8位元整數磁滯值。 第1圖係網路結構11之圖式，其中一或多WLANs 12， 13經過一或更多APsl7_19與一 WTRU 15通訊。在此實施例 13 200826549 蝴織22，麵或經由一 第2圖係表糊量或報賴態，表示事件 告，或觸發週期性報告。尤其是，第2圖，為 7么= 及顧之-單-報告之方案，當與絕對臨界值^ ^ :界=艮務^週，範圍用之類似週期性情況ί告相ΐ 表不味用之每—觸發事件用之週期性報i。^目^ 章巳哥疋測量26。此處所使用的「測量 J j的 !J*r28«° Γ 3卜此週期性測量28早可產早";報告RCpI 33。此情«告料提供一絕對臨二/42, ^^性，告 界值35或一服務中AP週期範圍36。此絕 矛^中^臨 絕對臨界值PSNI 37以及一絕對臨界Rcpi %。^ 34包= ^臨界簡47狀―服務ΐ Ip臨Ϊ 歷57以及―職切_® ro>I58。週圍 週期性報告PSNI67及—週期係報告rCPI68 3包括一 37^ 同時，此單-報告31可以基於包括報告。 及服務中AP臨界值RCPI似夕一服;Μ 5"界值PSNI47 件地被報告。此服務中ΑΡ週“的35而有條 被使用，但可以提供週期性 & ===31而不 範圍PSNI57及服務中週期 ；^之服務中AP週期 圍36。 观RCPI58之服務中AP週期性範 此單一及週期性測量27另， 31及情況報告32，週期性地報㈡此單—報告 臨界值35及服務中-週期性範圍 200826549 為單一報告PSNI 27，單一刼主 37，絕對臨界值RCPI 、絕對臨界值_ 中ΑΡ鄰界值RCPI 48，服;矛^处臨界值面47，服務 務中AP週期範圍RCH =力週中：ff生範圍刪57，服 報告RCPI68。對於情況報主而1_ ^ ° PSM 67以及週期性 些單:事魏伽1mg件侧職-或更多這 第3圖係表示資料速率選 具有 5.5、，2·。:二 =-絕對_。此速麵建立在丨==^’i質 準位之簡1準位。當時間經過時，似3 = λ之下。STA 3因此可以改變至5.5 Mbps速率，2 1 ~ _ PSNI 軸下降。STA2 維持 ^ MTS，漆直到f後STA 2具有足夠的PSNI準位以改變至
ίΓ這些在PSNI準財喊可被用以改 ，又APS ’猎由祕具有較高速率或PSN
之資源可_的話。 ㈣木目这AP #。+第吏用一傳遞用之服務中处之一相對臨界值之圖 表此圖表也5兒明在表現報告事件之一位置交會之盥 之測量品倾時間的魏。此圖細示來自—第—^ ^之- STA及-第二ΑΡ(Αρ2)之訊號。服務+处之測量被 降低-偏移值’其中PSNI更低，以便有利於奶。因此，服 務中AP之PSNI測量有技巧地麟讎—偏 此偏移所導致之傳遞之早期觸發。 风田方、 第5圖係表示報告偏移之效應之圖表，並表示呈現報告範 圍之AP1，2及3之相對臨界觸發以及當報告終止時。此圖表說 明時槽ISCP對應時間之ISCP臨界值及報告事件。被觸發的 15 200826549 之1點“期間二在^ i =服務中处之簡偏移報告時： 於吉t圖係表不服務，处之⑽：[準位之圖表。此i之觸 x 過的絕對臨界值。此觸發事件觸發一報告。 徵可祐ϊϋΐϊ特徵及元胁蚊實細巾翻述，每一特 私明十獨㈣要較佳實施例之其它特徵及元件），或以本 卷月或不以本發明其它特徵及元件組合使用。
Ο 【圖式簡單說明】 第1圖係一網路結構之圖式，於其中WLANs經由一或更吝在 ，點與了無線傳輸/接收單元(WTRU)通訊。 f 2圖係表示測量或報告型態之圖表。 ，3圖係資料速率選擇上之絕對臨界值之影響的圖表。 第4圖係使用一傳遞(handoff)用之服務中ap之相對臨界值之 圖表。 ^ 5圖係一報告偏移之影響的圖表。 第6圖係表示服務中AP之接收頻道功率指示(RCPI)之圖表。 【主要元件符號說明】 22網路連結 23無線網路控制器 26測量 27單一 28週期性 29單一報告 32情況報告 33週期性報告 16 200826549 34絕對臨界值 35服務中AP臨界值 36服務中AP週期範圍

Claims (1)

  1. 200826549 十、申請專利範圍： 號碼元素、—頻帶元素、一頻道 2· _#專，項所述之 量要求所適用的頻道號碼。& -中"員魏谢曰不該測
    1機^，請嶋補測量要 1循知，針瓣綱為該要求 5含項所述之方法’其中該測量躺元素更包 6·量如用申^^翻f 1項所述之妓，其巾該掃減雜示為剛 7士申請專利範目第6項所述之方法，其巾為測量關該模式為 一主動模式。 8·如申請專利範®第6項所述之方法，其巾為測量用的該模式為 一被動模式。 9·如申請專利範圍第6項所述之方法，其中為測量用的該模式為 一信號表模式。 如申請專利範圍第1項所述之方法，其中該頻道號碼元素、頻 帶元素以及掃描模式元素皆以8位元表示。 、 11二如申請專利範圍第1項所述之方法，其中該測量期間由16位 元表示。 12·如申請專利範圍第1項所述之方法，更包含： 從該第二STA接收一信號報導，該信號報導包含要求的測量。 18
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